1. The Muscular System
Muscles are responsible for all types of body movement
Three basic muscle types are found in the body
Skeletal muscle
Cardiac muscle
Smooth muscle

2. Moving the human body Muscles of the body
Muscle-an organ that contracts and gets shorter- this provides the force to move your body parts.
Muscles of the
body

3. Muscle Control Voluntary muscles- muscles that you are able to control
Examples are leg and arm muscles
Involuntary Muscles- you can not move them consciously. They just keep working
Examples- heart

4. Muscular System Functions
The muscular system moves the body.
The body has over 600 muscles.
Some muscles are called voluntary, that means that you choose to use them. How active you are depends on how much use they get!
Some muscles are called involuntary because they work without you thinking about them. These are muscles like the heart and digestive system.

5. 3 types of muscles
Smooth Muscles- Which include the muscles of internal organs and blood vessels. These muscles move involuntary.
Cardiac Muscle- Found only in the heart and also involuntary.
Skeletal Muscles- Are voluntary and help you move.

6. Types Of Muscles
Smooth Muscle- Digestive organs, Makes up 7-8% of your muscles.
Involuntary

7. Types of Muscles cont. Cardiac Muscles- Only found in the heart.
Involuntary.
Makes up 3% of your muscles.
By age 70 heart contracts 2.5 billion times (assume resting heart beat).

8. Types of Muscles cont. Skeletal Muscles- Makes up 90% of your muscles.
Voluntary- These are the muscles that you can move.

9. Skeletal Muscle Characteristics
Most are attached by tendons to bones

10. Skeletal Muscle Attachments
Epimysium blends into a connective tissue attachment
Tendon – cord-like structure
Aponeuroses – sheet-like structure
Sites of muscle attachment
Bones
Cartilages
Connective tissue coverings

11. Smooth Muscle Characteristics
Has no striations
Spindle-shaped cells
Single nucleus
Involuntary – no conscious control
Found mainly in the walls of hollow organs

12. Cardiac Muscle Characteristics
Has striations
Usually has a single nucleus
Joined to another muscle cell at an intercalated disc
Involuntary
Found only in the heart

13. Function of Muscles Produce movement Maintain posture Stabilize joints
Generate heat

14. Muscles and bones work together
Working together
A review

15. Why do I need tendons? Try This...
Tendons attach my muscles to my bone helping my body move.
Feel your tendon right above your heel in the back of your leg.
This is the thickest tendon in your body.
Try This...